1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9da1281ae66a90b518b5782aef7b757107dfa6160e87417b537fb94a55a7f7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edda97b9-1491-4a29-a824-0038f9c2d684.json and https://artists.proofprofile.net/proofs/artist/edda97b9-1491-4a29-a824-0038f9c2d684.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bdb1e1c5fb9df58f2a5a7b0f8a04016acfa95cfb2fee85cc269227881a3c6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610000968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe2569c24f299a7197d7f4c26cad3fa4dbbe8f1a4808f089bf07b60361ea0a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG579303301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903e3574cec0f5087f996a3bac5f26afbfe89ce448a9f2554901344b9487cfda. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5d6105341378c0a3e55b6f0fcdd945fccadefff24996995a54418064d7011e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610300677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c17d39a2a44a5185f90486cb36358c9159bdc2b673c4a73b15bf4cb518f6ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bdb1e1c5fb9df58f2a5a7b0f8a04016acfa95cfb2fee85cc269227881a3c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610000968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec04b4690118ca52af3f7fe43d748da117f3d3d8e314fd9b300a33a1b11345ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610200126.
LONG TIME NO SEE演唱會 (Live in Hong Kong / 2002)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e2bc099534454d85a7b93a13ccd603cc2b48511641a9dfa8d0ea4ef46ef890. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610200480.
UNFORGETTABLE 演唱會 (Live in Hong Kong / /2003)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02085cb4d2e7ecaad7b710954f18476884f99bb0b315545539676949e99adb0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKUM72400032.
黃凱芹神話音樂劇《白蛇青蛇》原聲大碟
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d76d8c00d485618ad3105a9158bc3f24c6dcf056971319e8c42bc8e6fe04626. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8411f943a7c7ca9133263ca0624cfce17fa0ccdd36af94e1d17ad00f28531fdb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e2bc099534454d85a7b93a13ccd603cc2b48511641a9dfa8d0ea4ef46ef890. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKA610200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c3c6a10d56a3db4cd12c4958a1b86ac235e70f93a41ec49f04d0655d98a0a0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE971607506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5957f7e6eadb0cbc7ac1beb7be2ff3d011a9bfd63d59a9cca5a883f28a6022d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI311725603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f65f84f7ee21a85d1b00020252cc01a7d29eb4da9fbeb6b9ce7e71bfc1e7d8c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE971811209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131937880c7bb918a1ee55ec027ba282f14dafb82f8bde27014fcd5bd9c48d41. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2566424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21fdd8099c84447e509886d28009bcbb8597e2120624c400ea0b27893d81878. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2574350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785029c0accc863e1ec7400ca9235ad59f6e8565c407803e5082cf7864959e64. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2536400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd861485bd2ea2096631cbe8520f525d85c89e3d6b0e2bd27c5c172b96280dda5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKUM71000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08510e0c4c3febfbe53f710eb0a6737cd82a0b04c53c8b14c7a46c3f597210ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKUM70900514.